| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it difficult for [pron] [verb] | 27 |
|
| 2 | [vb past] it difficult [prep] [pron] [verb] | 27 |
|
| 3 | [vb past] it difficult for [pron] [verb] | 27 |
|
| 4 | made it difficult [prep] [pron] [verb] | 26 |
|
| 5 | [vb past] it difficult [prep] [pron] [to-vb] | 26 |
|
| 6 | [vb past] it difficult [prep] [pers pn] [verb] | 26 |
|
| 7 | [vb past] it difficult [prep] they [verb] | 10 |
|
| 8 | [vb past] it difficult [prep] them [verb] | 10 |
|
| 9 | [vb past] it difficult [prep] him [verb] | 7 |
|
| 10 | [vb past] it difficult [prep] he [verb] | 7 |
|
